@article{GorbanAlex17, author = {Gorban, Alexander N., Mirkes, Evgeny M. and Zinovyev, Andrei}, title = {Robust principal graphs for data approximation}, year = {2017}, journal = {Archives of Data Science, Series A}, volume = {2}, number = {1}, pages = {147-162}, doi = {10.5445/KSP/1000058749/11} }